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Plasmonic nanosensor based on Fano resonance in waveguide-coupled resonators |
Optics Letters, Vol. 37, Issue 18, pp. 3780-3782 (2012)
http://dx.doi.org/10.1364/OL.37.003780
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Abstract
We propose a plasmonic nanosensor based on Fano resonance in the strong-confinement metal–dielectric–metal waveguide side-coupled with a pair of nanoresonators. Due to the coherent interference of the splitting discrete and quasi-continuum modes, the reflection spectrum possesses a sharp asymmetric Fano resonance dip, which is dependent on the cavity–cavity phase and the refractive index change of the dielectric. The physical features contribute to a highly efficient plasmonic sensor for refractive index sensing. The nanosensor yields a sensitivity of
© 2012 Optical Society of America
OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(230.4555) Optical devices : Coupled resonators
(280.4788) Remote sensing and sensors : Optical sensing and sensors
ToC Category:
Optical Devices
History
Original Manuscript: June 8, 2012
Revised Manuscript: July 31, 2012
Manuscript Accepted: August 6, 2012
Published: September 6, 2012
Citation
Hua Lu, Xueming Liu, Dong Mao, and Guoxi Wang, "Plasmonic nanosensor based on Fano resonance in waveguide-coupled resonators," Opt. Lett. 37, 3780-3782 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3780
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